The Burgruine Werdenfels are castle ruins in Garmisch-Partenkirchen with rich history. There are two wonderful lakes and beautiful mountain views. The ruins are open year-round, from 11:30 to 18:00. To reach the Werdenfels ruins, park at Feldenkopfstraße near the end of the road. From there, it is an easy 45-minute hike to the ruins. Along the path, there are informative boards telling the story of the castle and its inhabitants. Although this is a child-friendly hike, it is not easily accesible to strollers. Once you've reached the top, there are two delicious restaurants: the Berggasthof Pflegersee and the Werdenfelser Hütte. There are also multiple hiking and biking tours of the area with varying difficulties. More information can be found here.